package com.atguigu.gulimall.product.controller;

import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import com.atguigu.gulimall.product.entity.CategoryEntity;
import com.atguigu.gulimall.product.service.CategoryService;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.R;


/**
 * 商品三级分类
 *
 * @author wengjiangle
 * @email wengjiangle666@163.com
 * @date 2021-02-19 10:11:20
 */
@RestController
@RequestMapping("product/category")
public class CategoryController {
    @Autowired
    private CategoryService categoryService;

    /**
     * 查出所有分类以及子分类，以树形结构组装起来
     */
    @RequestMapping("/list/tree")
    //@RequiresPermissions("product:category:list")
    public R list() {
        //取出所有分类
        List<CategoryEntity> entities = categoryService.listWithTree();
        List<CategoryEntity> collect = entities.stream().filter((entity) -> {
            return entity.getParentCid() == 0;
        }).map((entity) -> {
            entity.setChildren(getChildren(entity, entities));
            return entity;
        }).sorted(Comparator.comparingInt(m -> (m.getSort() == null ? 0 : m.getSort())))
                .collect(Collectors.toList());
        return R.ok().put("data", collect);
    }

    private List<CategoryEntity> getChildren(CategoryEntity root, List<CategoryEntity> all) {
        List<CategoryEntity> childEntity = all.stream().filter((categoryEntity) -> {
            return categoryEntity.getParentCid() == root.getCatId();
        }).map((categoryEntity)->{
            categoryEntity.setChildren(getChildren(categoryEntity,all));
            return categoryEntity;
        }).sorted(Comparator.comparingInt(m -> (m.getSort() == null ? 0 : m.getSort())))
                .collect(Collectors.toList());
        return childEntity;
    }


    /**
     * 信息
     */
    @RequestMapping("/info/{catId}")
    //@RequiresPermissions("product:category:info")
    public R info(@PathVariable("catId") Long catId) {
        CategoryEntity category = categoryService.getById(catId);

        return R.ok().put("category", category);
    }

    /**
     * 保存
     */
    @RequestMapping("/save")
    //@RequiresPermissions("product:category:save")
    public R save(@RequestBody CategoryEntity category) {
        categoryService.save(category);

        return R.ok();
    }

    /**
     * 修改
     */
    @RequestMapping("/update")
    //@RequiresPermissions("product:category:update")
    public R update(@RequestBody CategoryEntity category) {
        categoryService.updateById(category);

        return R.ok();
    }

    /**
     * 删除
     */
    @RequestMapping("/delete")
    //@RequiresPermissions("product:category:delete")
    public R delete(@RequestBody Long[] catIds) {
//        categoryService.removeByIds(Arrays.asList(catIds));
        categoryService.removeMenusByIds(Arrays.asList(catIds));
        return R.ok();
    }

}
